I want to park my 30' Breakaway on a downward sloping driveway, head first, I then want to used the leveling jacks to raise the front to level, then put blocked jack-stands under the frame and raise the leveling jacks leaving the weight of the coach on the jack-stands. The jack-stands are rated for twice the coach weight. Does anyone see and problems with this technique.

Well, it would depend a little on how much slope you have. But as for me, I wouldn't depend on anything unless it was dead level. Of course, I'm sort of ultra careful--close to OCD. But then, I'm still alive at 74. Another thing, jack stands create a point load and are really not the most stable thing in the world. It's one thing to have a 4000# car on them, but a 16000/20000 pound motor home? Is there some other way to do what you need to do?

I would recommend you place the jack stands as close as possible to a crossmember nearest the front wheel axle location so as to not place any torque on the frame. Other than that I see no reason not to do what you suggest.

I would also put wooden ramps or blocks under the wheels to take up as much space as possible so if the stands failed for any reason, the coach would not fall more than an inch or two.